<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta
      name="viewport"
      content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no,viewport-fit=cover"
    />
    <title>MVC Demo</title>
  </head>
  <body>
    <div class="page">
        <section id="app1">
          <div class="output">
            <span id="number">100</span>
          </div>
          <div class="actions">
            <button id="add1">+1</button>
            <button id="minus1">-1</button>
            <button id="mul2">*2</button>
            <button id="divide2">÷2</button>
          </div>
        </section>
        <section id="app2">
          <ol class="tab-bar">
            <li><span>tab1</span></li>
            <li><span>tab2</span></li>
          </ol>
          <ol class="tab-content">
            <li>内容1</li>
            <li>内容2</li>
          </ol>
        </section>
        <section id="app3">
          <div class="square"></div>
        </section>
        <section id="app4">
          <div class="circle"></div>
        </section>
      </div>
      <script src="main.js"></script>

  </body>
</html>
